Aluminum alloy and method of producing the same.



snares earner asses;

WILLIAM A. MOADAMB, OF BAY SHORE, NEW YOBK.

ALUEZINUM ALLOY AND METHOD OF PRODUCING SAME.

Fifififiifiv'i'.

35o Drawing.

To all whom it may concern Be it known that 1, WILLIAM A. MoAnAMs, a citizen of the United States, and resident of Bay Shore, in the county of Suffolk and State of New York, have invented a new and useful Improvement in Aluminum Alloys and Methods of Producing the Same, of which the following is a specification.

My invention consists in an aluminum alloy and in the method of producing the same, said alloy comprising a novel combrnation of materials in novel proportions, producing a composition of matter especially well adapted for casting, said composition being very strong and resonant and having a permanent superior luster.

The alloy is composed of aluminum, zinc, silver and copper combined in substantially the following proportions by weight; alumizinc twenty parts, silver alf parts, and copper five num sixty parts sixteen and oneparts.

' In producing the alloy, the method which I have found to be the best is as follows:

' The aluminum is melted and raised to a suf- Specification of Letters Patent. Application filed March 20, 1912. Serial No. 685,035.

Patented Got. 21, was.

permanent luster of a superior quality. It will be very resonant and will have great strength for so light a composition.

What I claim is:

1. An aluminum alloy composed of aluminum, zinc, silver and cop )er, thc proportion by wei ht of aluminum l that of the zinc, the proportion of zinc by weight being greater than that of the silver and the proportion by weight of the silver being greater than that of the cop er.

2. An aluminum alloy composed of aluminum, zinc, silver and copper combined in substantially the following proportions by weight: aluminum sixty parts, zinc twenty parts, silver sixteen and one-half parts and copper five parts.

3. The method of forming an aluminum alloy composed of aluminum, zinc, silver and copper, consisting in melting the aluminum and raising to a temperature suiiicient-ly high to cause it to show a red color, than introducing the copper and the silver, then lowering the temperature of the mass until it shows substantially no red color and then introducing the zinc and thoroughly agitating the mass.

In testimony, that I claim the foregoing; as my inventioml have signed my name in )resence of two witnesses, this 18th day of March, 1912.

\VILLIAM A. MCADAMS.

'Witnesses F. Gannon BARRY, O. S. SoNnonsN.

at this patent may be obtained for five cents each, by addressing the Commissioner c2 I'Patetits,

Washington, D. 6."

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